Single Nucleotide Polymorphisms in the HIRA Gene Affect Litter Size in Small Tail Han Sheep
Animals, 2018 Maintenance of appropriate levels of fecundity is critical for efficient sheep production. Opportunities to increase sheep litter size include identifying single gene mutations with major effects on ovulation rate and litter size. Whole-genome sequencing
Mei Zhou +13 more
doaj +1 more source
Selection for environmental variance of litter size in rabbits
Genetics Selection Evolution, 2017 Background In recent years, there has been an increasing interest in the genetic determination of environmental variance. In the case of litter size, environmental variance can be related to the capacity of animals to adapt to new environmental ...
Agustín Blasco +4 more
doaj +1 more source
Food resource allocation patterns in lactating females in a long-term selection experiment for litter size in mice [PDF]
, 2002 Resource allocation patterns, as quantified by residual food intake (RFI), and the consequences for offspring development were investigated during lactation in 96 females of a mouse line selected for 104 generations for high litter size at birth (S-line)
Luiting, Petronella +18 more
core +1 more source
Marine Litter Distribution and Density in European Seas, from the Shelves to Deep Basins [PDF]
, 2014 Anthropogenic litter is present in all marine habitats, from beaches to the most remote points in the oceans. On the seafloor, marine litter, particularly plastic, can accumulate in high densities with deleterious consequences for its inhabitants.
Morato, Telmo +138 more
core +1 more source
On the Evolution of Litter Size in Peromyscus leucopus [PDF]
Evolution, 1978 Litter or clutch size is an important component of an organism's total reproductive effort. Because of its importance, the evolution of litter or clutch size has received considerable theoretical attention (e.g., Brockelman, 1975; Cody, 1966; Lack, 1948; Mountford, 1968; Ricklefs, 1970; and Smith and Fretwell, 1974). Most authors point out that optimal
Theodore H, Fleming, Robert J, Rauscher
openaire +2 more sources
Sample size requirements for riverbank macrolitter characterization
Frontiers in Water, 2023 Anthropogenic litter is omnipresent in terrestrial and freshwater systems, and can have major economic and ecological impacts. Monitoring and modeling of anthropogenic litter comes with large uncertainties due to the wide variety of litter ...
Sjoukje I. de Lange +14 more
doaj +1 more source
Genetic variants of the bone morphogenetic protein gene and its association with estrogen and progesterone levels with litter size in Awassi ewes [PDF]
Iraqi Journal of Veterinary Sciences, 2022 This research aimed to assess the genetic polymorphism of the BMP15 gene concerning sex hormone levels and birth type in Awassi ewes. The genome DNA of 138 Awassi ewes was isolated (52 ewes produced a singleton and 86 produced twins). The BMP15 gene exon-
Marwa A. Ali +2 more
doaj +1 more source
INFLUENCE OF THE MALE ON LITTER SIZE IN MICE [PDF]
Reproduction, 1964 Summary. The size of litters sired by male mice throughout their entire life has been followed. Each male was paired with a new young female approximately every 5 months so as to avoid any effect of ageing of the dam. There were three groups of males (1) entire, (2) unilaterally castrated and (3) 9 months younger than the first two ...
openaire +2 more sources
Vocal mother-offspring communication in guinea pigs: females adjust maternal responsiveness to litter size [PDF]
, 2008 In parent-offspring communication, vocal signals are often used to attract attention and offspring might call to induce parental behaviour. In guinea pigs (Cavia aperea f.
Marc Naguib +12 more
core +2 more sources